Pedal $60.00
Shipping $8.00
Tax $5.61
Total $73.61



Build Your Own Clone Stereo Flanger board

Original Pedal

BYOC original design


This is a BYOC original design, not a copy of a particular circuit.  It's a nice flanger.  Like many modulation effects, this is a fairly complex circuit, but with nice options/controls built in.  Metal film resistors to reduce noise.  Poly, ceramic, and electrolytic caps.  Internal clock trimmer (keep track of the original setting if you decide to adjust it).  Uses classic analog BBDs that are becoming expensive and hard to find.  Most flangers have a single BBD, but this circuit allows you to choose between a single BBD or two BBDs for "lush" flanging.  The BBDs are the great MN3207's, with an MN3102 clock.  Special timing circuitry adjusts the LFO to correct flanging timing for this BBD which has more "buckets" than normal flanging delays require.  Other components include 1N4148 clipping diodes for a little dirt (not usually found in a modulation circuit), JRC4558D op amps for audio and TL022 for the LFO control, 2N5087 and 2N5088 silicon transistors, and BS170 MOSFETs for nice "tubey" tone.  Mono output from the Mono jack and stereo output using both output jacks.  The enclosure is missing one screw because the hole was made incorrectly and is too large for a normal enclosure screw.  You could probably thread it for a larger diameter screw, but we never bothered with it.

A few words about those dual BBDs...  Flangers (as well as chorus and some other modulation/timing effects) split the signal path in two, process them differently, then put them back together.  The interaction between the signal path differences create the effect you hear.  A BBD is used on one path to cause a short delay in a flanger.  In this design, there is a second BBD that can be switched in to add a second delayed signal path that is just a tiny bit different from the primary delayed signal path, making it a little more similar to a chorus.  Your ears perceive that added signal path as adding more "lushness".  It's not an over-the-top type of change, but gives you something a bit different to work with.


 Standard 2.1mm 9VDC center negative Boss-style power connector only - no battery clip.  Should be good from 9V up to 18V to provide more clean headroom, but was only tested at 9V.  Note that the BBD section of the circuit is limited to 5V by the BBD specs.


Rate, Manual, Depth, and Regen controls are similar to other well-known flangers.  Has on/off indicator LED.  Switch for normal or "lush" 2-BBD modes.